Ventilated ignition distributor for internal-combustion engines



Feb. 11, 1947. M, MALLQR'y 2,415,511

VENTILATED IGNITION DISTRIBUTOR FOR INTERNAL-COMBUSTION ENGINES FiledMay 7, 1945 2 Sheets-Sheet 1 1 V w w- Q.

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VENTILATED IGNIT ION DISTRIBUTOR FOR INTERNAL-COMBUSTION ENGINES- FiledMay 'r, 1945 2 Sheets-Sheet 2 INVENTOR. Mar/0n fiZal/ory PatentedFeb-.11, 1947 mm STATES PATN VENTILATED IGNITION DISTRIBUTOR FORINTERNAL-COMBUSTION ENGINES Marion Mallory, Detroit, Mich. ApplicationMay 7, 1945, Serial No. 592,470 8 Claims. 01. 123-103) It is an objectof this invention to produce a simple arrangement for ventilating thedistributor housing. This object is accomplished by utilizing thesuction. actuated device for an engine governor as a bellows to sweeptheozone out of, and draw fresh air into, the distributor housing. 1

Fig. 1 is a view partly in section showing my combined governor andventilated ignition distributor housing. Fig. 2 is a section along theline 2-2 of Fig. 1.

Fig. 3 is a section along the line 3-3 of Fig. 2. 20

Fig. 4 is a section along the line 4-4 of Fig. 1. For purposes ofillustration, I have shown an engine governor which is actuated byintakepassageway suction of the type shown in my copending application SerialNo. 466,961, filed November 25, 1942. Therefore, I will only brieflydescribe this governor.

The parts of my governor are as follows: governor housing I, intakepassageway 2, outlet 3 to the engine intake manifold, throttle valve 4,

tension spring 5 tending at all times to open throttle valve 4, suctiondevice comprising a sealed housing 6, flexible diaphragm I, suctionchamber 8, atmosphere chamber 9, passageways In, H and i2 connectingsuctionchamber 8 with orifices i3 and I4 in the intake, passageway 2',

conduit i5 connecting passageways III, II and I2 with axial passagewayIS in ignition distributor shaft I! which is run oil the engine in aconventional manner (not shown), centrifugally unbalanced valve l8 invalve housing 19,- air bleed orificelll, bypass groove 2| :in valve 19,tension spring 22 which tends to hold centrifugal valve I! open,distributor housing 23, cap 24 for distributor housing 23, air inlet25-, air cleaner 28. The distributor is a conventional ignitiondistributor having the usual circuit breaker, distributor arm andpoints. A seal or gasket is provided between cap 24 and housing 23 so asto make the joint therebetween air-tight and shaft "is also providedwith an air-tight fit in housing 22 so that all the air entering housing23 must enter through air cleaner 28 and'inlet' 25. The inside of cap24, of course, communicates with the inside of housing 23.

For evacuating the air and ozone from inside the distributor housing(23, 24), I connect the inside of the housing by means of conduit 21 andconduit 28 into chamber 9 of suction device 6 8. Chamber 9 communicateswith atmospherev only through passageway 28, conduit 27, housing 23,inlet 25 and cleaner 26.

The operation of my governor is the same as described in my abovespecified copending application wherein the intake passageway suction,as

modified by air bleeding through orifice'20, passageways l6, I and I0,acts upon diaphragm 'l in opposition to tension spring 5 to controlthrottle valve 4 in accordance with the charge required 5 by the engineto maintain its governed speed.

In the operation of my governor, centrifugal valve I 8 rides the vacuumand restricts orifice 26 more as the speed of the engine tends to fallbelow its govemed speed than when the engine is running at its governedspeed.

When the engine is first started and speeds up from idle to its governedspeed, then upon reaching its governed speed valve I 8 will momentarilyclose. Thus,.during the operation of my 5 governor, diaphragm I willmove sometimes toward the right, Figs. 1 and 2, and then again will fiextoward the left. 'In other words, flexible diaphragm 1, under theinfluence of spring 5 and intake passageway suction, acts as a pumpsome- 0 times increasing chambers and sometimes decreasing chamber 9. Asdiaphragm 7 moves toward the right, Figs. 1 and 2, air is forced throughconduit 21 and into distributor housing 23 and thence out throughpassageway and air cleaner 28. At times some of the air displaced byrightward'movement of diaphragm I will pass through air bleed orifice 2|and conduit l5 into the intake passageway, but usually diaphragm I willbe moving towardthe right when valvel8 is-closed or nearly closed sothat most of the air displaced in housing 23 will pass outwardly\through opening '25. toward the left, enlarging chamber 9, thisdiaphragm action will draw fresh air through air cleaner 21 and inlet 25into distributor housing 23. Thus, the pumping action of diaphragm Iwill efi'ectively clean the ozone and any other harmful gases out ofhousing 23.

I claim:

1'; In an internal combustion engine having an intake passageway,-anignition distributor including a housingvhaving an inlet therein, asuction responsive device including a movable member actuated by changesof pressure in the 5.5 intake passageway, a communication between Asdiaphragm 1 moves 1 said suction responsive device on one side of saidmovable member and said intake passageway tributor housing and air drawnin through said inlet.

2. In an internal combustion engine having an intake passageway, athrottle valve controlling fluid flow through said passageway, anignition distributor including a housing having an inlet therein, asuction responsive device including a movable member actuated, bychanges of pressure in the intake passageway on the engine side of saidthrottle valve, a communication between said suction responsive deviceon one side of said movable member and said intake passageway wherebysaid movable member is actuated by intake passageway suction, a conduitconnecting said suction responsive device on the other side of saidmovable member into the distributor housing whereby as the movablemember of the suction device is actuated by changes of pressure in theintake passageway gas is forced out of the distributor housing and airdrawn in through said inlet.

3. In an internal combustion engine having an intake passageway, athrottle valve controlling fluid flow through said passageway, anignition distributor including a housing having an inlet therein, asuction actuated pump having a fluid pumping chamber and actuated bychanges of pressure in the intake passageway on the engine 'side of saidthrottle valve, a conduit connecting the fluid pumping chamber of saidpump into the distributor housing whereby as the pumpis actuated bychanges of pressure in the intake passageway gas is alternately forcedout of the distributor housing and air drawn in through the housinginlet.

4; The combination as set forth in claim 3 wherein said pump comprises apump housing and a flexible diaphragm having a connection with saidthrottle valve, the said flexible diaphragm dividing the pump housinginto a suction chamber connected into the intake passageway on theengine side of the throttle valve, and

a pumping chamber connected by the flrst-men-Z 4 side of the throttlevalve and a pumping chamber, a distributor housing, an air bleed orificelocated within said distributor housing, a conduit connecting said airbleed orifice with the suction chamber or said suction device, acentrifugal valve controlled in accordance with the speed of the engineand arranged to close as the engine reaches its governed speed wherebysaid suction device responds to the intake passageway pressure to movesaid throttle valve toward closed position, a conduit connecting thedistributorhousing with the pumping chamber of said suction devicewhereby as the suction device responds to changes in intake passagewaypressures to actuate said throttle valve a pumping action is set upwhich alternately forces gas out of the distributor housing and drawsfresh air into the housing.

6. The combination as set forth in claim 5 wherein the centrifugal airbleed valve mechanism comprises a distributor shaft, a valve housingmounted on the distributor shaft and having an air bleed orifice thereinand a centrifugally unbalanced valve mounted in the housing offset fromthe axis of rotation so that the valve itself constitutes thecentrifugal weight.

7. The combination as set forth in claim 5/ wherein the solecommunication between atmosphere and said pumping chamber is through thesaid conduit and distributor housing.

8. In an internal combustion engine having an intake passageway, athrottle valve controlling fluid flow through said passageway, anignition distributor including a housing having an inlet therein, asuction actuated pump having a fluid pumping chamber in communicationwith said ignition distributor housing and a suction chamber incommunication with the intake passageway on the engine side of saidthrottle valve whereby said pump responds to the intake passagewaysuction, fluid bleed means controlled in accordance with the speed ofthe engine for bleeding fluid into said suction chamber when the engineis running below a given speed to raise the pressure in said chamberandfor closing off said fluid bleed when the engine is operatingREFERENCES orrnn The following references are of record in the thispatent:

, UNITED STATES PATENTS 4 Name Date file of Number 2,149,516

